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代码如下: public class Main_bytesToStr { public static void main(String[] args) throws IOException { // TODO Auto-generated method stub System.out.println("defaultCharset: " + Charset.defaultCharset().name()); System.out.println("file.encoding:…
Controllers and Routers in ASP.NET MVC 3 ambilykk, 3 May 2011 CPOL 4.79 (23 votes) Rate: vote 1vote 2vote 3vote 4vote 5 A deeper look into the two pillars of ASP.NET MVC – Routers and Controllers. Introduction ASP.NET MVC provides a new way of creati…
Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is "yes", if 6 is a decimal number and 110 is a binary number. Now for any pair of positive integers N1 and N2, your task is to find the rad…
Trie (字典树) "A", "to", "tea", "ted", "ten", "i", "in", "inn" 这些单词组成的字典树. Radix Tree (基数树) 基数树与字典树的区别在于基数树将单词压缩了, 节点变得更少 Suffix Tree (后缀树) 单词 "BANANA" 的后缀树. 每个后缀以 $ 结尾…
#include<iostream> #include<ctime> #include <stdio.h> #include<cstring> #include<cstdlib> #include <map> #include <string> using namespace std; // A utility function to get maximum value in arr[] int getMax(int ar…
1010. Radix (25) Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is "yes", if 6 is a decimal number and 110 is a binary number. Now for any pair of positive integers N1 and N2, your task i…
原文   基数(radix)树 Linux基数树(radix tree)是将指针与long整数键值相关联的机制,它存储有效率,并且可快速查询,用于指针与整数值的映射(如:IDR机制).内存管理等.IDR(ID Radix)机制是将对象的身份鉴别号整数值ID与对象指针建立关联表,完成从ID与指针之间的相互转换.IDR机制使用radix树状结构作为由id进行索引获取指针的稀疏数组,通过使用位图可以快速分配新的ID,IDR机制避免了使用固定尺寸的数组存放指针.IDR机制的API函数在lib/idr.c…
Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is "yes", if 6 is a decimal number and 110 is a binary number. Now for any pair of positive integers N1 and N2, your task is to find the rad…
1.   并发技术 由于需要页高速缓存是全局的,各进程不停的访问,必须要考虑其并发性能,单纯的对一棵树使用锁导致的大量争用是不能满足速度需要的,Linux中是在遍历树的时候采用一种RCU技术,来实现同步并发. RCU(Read-Copy Update),是一种保证读该radix tree的时候,可以不要管insert/delete操作,即不需使用锁.从内核代码来看,lookup操作的时候,读一个节点的时候,采用类似于 node = rcu_dereference(*slot); 的调用.Inse…
一.概述 Linux radix树最广泛的用途是用于内存管理,结构address_space通过radix树跟踪绑定到地址映射上的核心页,该radix树允许内存管理代码快速查找标识为dirty或writeback的页.Linux radix树的API函数在lib/radix-tree.c中实现. Linux基数树(radix tree)是将指针与long整数键值相关联的机制,它存储有效率,并且可快速查询,用于指针与整数值的映射(如:IDR机制).内存管理等. 上图显示了一个有3级结点的radix…